Cylinder, zero air 34 L

Single-gas monitor that is comfortably worn on the wrist like a watch (also displays the time). A convenient, inexpensive, hands-free method of gas monitoring for personal protection against oxygen deficiency, carbon monoxide, or hydrogen sulfide. The built-in vibrator, audible, and visual alarms immediately alert the user of a dangerous gas condition. Controlled by a microprocessor for reliability and advanced capabilities. High-quality accessories and replacement parts are available, including pre-mixed calibration gases and additional sensors.

Features:
Large digital readout with backlight - automatically displays alarm condition of PEAK, TWA, and STEL
Replacement sensors are inexpensive, field replaceable, with 2-year life expectancy
Equipped with a watch band, an optional alligator, a belt, ora hard hat clip
Operates over 3000 hours on one battery (approximately 1 year of normal use)